/*
 * Copyright 2022 Splendo Consulting B.V. The Netherlands
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */

package com.splendo.kaluga.base.utils

import kotlinx.coroutines.Deferred

/**
 * Gets the [Deferred.getCompleted] value if [Deferred.isCompleted] or null otherwise.
 *
 * It will still throw an exception is the Deferred was completed exceptionally, unless this was with an [IllegalStateException]
 */
fun <T> Deferred<T>.getCompletedOrNull(): T? = try {
    getCompleted()
} catch (e: IllegalStateException) {
    null
}
